SOLUTION: You are driving from Houston to San Antonio on Interstate 10. You travel half the distance at 50 km/h and the other half at 92 km/h. What is your average speed(km/h)?

Question 288779: You are driving from Houston to San Antonio on Interstate 10. You travel half the distance at 50 km/h and the other half at 92 km/h. What is your average speed(km/h)?
Found 2 solutions by richwmiller, Deina:
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
s=distance to San Antonio
50x=s/2
x=s/100
92y=s/2
y=s/184
d/t=r
(total distance)/(total time)=average rate
=64.79 kph
not (92+50)/2
not 142/2=71
Why? Because he spent more time at 50 kph than at 92 kph

Answer by Deina(147) (Show Source): You can put this solution on YOUR website!

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